Yes, there were key factors and/or symptoms when I went to the ER that differentiated anxiety and panic attacks versus cardiac manifestations. During cardiac episodes, I had heart palpitations throughout the day leading up to my evening ER visit, I was diaphoretic (sweaty), nothing I did including deep breathing and other such relaxation techniques would stop the heart palpitations and eventually SVT. During anxiety related ER visits something that occurred throughout my day initiated my symptoms. My breathing became more rapid, thoughts raced, and often times I felt fearful something was going to happen but typically had no idea what.